California Business And Professions Code Section 13

The term materia medica as used in this code or in anyinitiative act referred to in this code, means those substanceslisted in the official United States Pharmacopoeia, the officialHomeopathic Pharmacopoeia of the United States, the official UnitedStates Dispensatory, New and Nonofficial Remedies, or the NationalFormulary, or any supplement thereof, except substances covered bysubdivision (a) of Section 4052 and Section 4057 of this code.